Treatment of ulcers and hypertension

A method for treating ulcers or hypersecretion in a mammal which comprises administering to said mammal an effective amount of a compound of formula I

• Ar--A--S--Y I
• wherein Ar represents a cycloalkyl group of 5 to 7 carbon atoms, or a phenyl group which may be substituted by one or more of the following:
• halogen, nitro, lower alkoxy, hydroxy, hydroxyloweralkyl, loweralkoxyloweralkyl, amino, loweralkylamino, aralkoxy, diloweralkylamino, loweralkyl, aryl or aralkyl of 7 to 10 carbon atoms or disubstituted by a loweralkylenedioxy radical;
• A represents a saturated or olefinically unsaturated alkylene radical having from 1 to 6 carbon atoms, which may be substituted by lower alkyl of 1 to 6 carbon atoms, oxo, or hydroxy, S is sulphur and Y is a radical of formula ##STR3## wherein R.sup.1 is hydrogen, lower alkyl, hydroxylower alkyl, loweralkoxyloweralkyl, loweralkoxy, halogen, formyl, phenyl, phenylalkyl or acetal i.e. CH(OR.sup.4).sub.2 where R.sup.4 is lower alkyl or two R.sup.4 radicals are joined to form a lower alkylene chain, R is lower alkyl of 1-4 carbon atoms, aryl or aralkyl of 7 to 12 carbon atoms, m is 1 or 2 and Z.sup.- is an anion, or an acid addition salt of a compound containing a radical of formula II or IIa, with the proviso that when Y is a radical of formula II, Ar is other than aralkoxyphenyl.